No .. the flavor of what I was interrogating of his code and docs seemed to indicate that both the parsing and compiling of the DRL could be done in one step ... which is what I'd prefer to do given the application I'm looking at it for ....


******************************

On Mon, Jan 2, 2012 at 2:40 PM, Esteban Aliverti <esteban.aliverti@gmail.com> wrote:
Just out of curiosity, did you try adding a binary package instead of a DRL?

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Esteban Aliverti
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On Mon, Jan 2, 2012 at 2:30 PM, Matthew Versaggi <profversaggi@gmail.com> wrote:
Here's what I got working and when it failed .... it was just the basic 'hello world' kind of stuff:

Worked:
final KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();

Died:
// this will parse and compile in one step
kbuilder.add(ResourceFactory.newClassPathResource("HelloWorld.drl", DroolsTest.class), ResourceType.DRL);

LogCat:
01-02 13:13:17.684: E/AndroidRuntime(537): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.versaggi.android.droolsandroidtest/com.versaggi.android.droolsandroidtest.DroolsAndroidTestActivity}: java.lang.NullPointerException

That's about as far as I could get.

I think this DOC will probably help out ....
https://github.com/cgreenhalgh/droolstest/blob/8ea1a06d9b1b38a40b1add7f988ebbf9f4ff3e88/docs/drools-on-android.html....

I had to re-compile the CompositeClassLoader.java file and then reinsert it into the drools-api-5.1.0.M2.jar file to get past this issue:

"A small modification is needed in org.drools.util.CompositeClassLoader. Apparently, the Android JVM doesn't allow null as the parent classloader so I changed that to super(CompositeClassLoader.class.getClassLoader()) in the constructor, and that works fine."

However I think that his other modifications aren't completely integrated into the drools-compiler-5.1.0.M2.jar or the drools-core jar files he provides just yet.

*********************************



On Mon, Jan 2, 2012 at 2:11 PM, Wolfgang Laun <wolfgang.laun@gmail.com> wrote:


On 2 January 2012 13:58, profversaggi <profversaggi@gmail.com> wrote:
I've run across the work of a very bright man in the UK who did it as part of
an integrated systems he was working on ... and I got his code working up to
the point where it died loading the DRL rules.

His rules? Your rules? Did you try the simple "Hello World" rule?

rule HW
when
then
    System.out.println( "Hello world" );
end

-W


I think this might shed some light on things but it's fast getting into true
software engineering and I'm just not there yet ....

Here is his codebase:
https://github.com/cgreenhalgh/droolstest


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